First thing you need IMHO is a clear understanding of the difference between a trader and an investor

BUY and HOLD is investing and for that yes you could do your typical fundamental analysis and check for the coin/community and all the basics

But, if your aim is to be a trader you should concentrate on learn Technical Analysis (TA) and read charts because your aim as a trader is to capitalize on the market movement for a particular time frame...

What you really don't want to do is be a trader that becomes an investor because he place a trade and went in the opposite direction, that would be your biggest mistake.

Dollar-Cost Average is a good technique to use and it will give you some buffer but you should enter the trade with a plan already, and keep in mind that most traders really don't even like that.

Is very possible that most traders would advise you to "cut your losses" and move to the next trade... and is perfectly fine too.

Usually with a good edge to enter/exit you should keep your risk always low, say risk 1 to make 2 as a rule of thumb

There is no way to win all the time in any trade, you can not predict what's coming but you should be prepared always before you even place a buy.

TA and indicators are a good guide and some of them will give you an edge, but money management is key.

Fear and Greed are main factors so be prepared for an outcome but expect nothing, whatever happens you had a plan in place, that's the best way I know to help with your emotions, the other is with a bot ofc.

But even with a bot my advise is to keep learning bots are good tools for automation and emotionless trading, but you still need to tell the bot what you want to do.

Hope it Helps.